Ho model



No. 749,664. PATENTND JAN. l12, 1904; E. I.. N. DENIS.

KINETIC 'ENERGY MACHINE.

APPLICATION FILED 00T. 9. 1902.

3 SHEETS-SHEET 1.

N0 MODEL.

E 410.749,664. PATBNTED 3441.12, 1904.

E. L. N. DENIS.

KINETIG ENERGY MACHINE.

I APPLIOATIO FLED 00T. 9, 1902.

3 SHEETS-SHEET 2` N0 MODEL.

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No. 749,664!Y v PATENTED-J'AN .512, 1904:t .E. L. N. DENIS. KINETIUENERGY MACHINE.

APPL IOA.TI 0N FILED 00T.,9, 1902.

s SHEETS-sum1? a.

NO MODEL.

No. l749,664.

Patented amiary i2, 1904.

PATENT GEEICE.

EMILE LOUIS NICOLAS DENIS, OF PARIS, FRANCE.

,KlNETlCr-ENERGY MACHINE.

SPECIFICATION forming part of Letters Patent No. 749,664, dated January12, 1904.

` Application ined october 9,1902.

To all whom, it may concern:

Be it known that I, EMILE LoUrs NICOLAS Dnvisivil engineer,of 135Boulevard Mnilmontant, in the city of Paris, Republic of France, haveinvented a Kinetic-Energy Machine, of which the following is a full,clear, and exact description.

The invention forming the object of the present application for a patentis relative to a system of mechanism acting on the principle of m'snica, the movement of which is desmodromcal, and which is applicable topunches, scales, cutters, hammers, and other similar machines.

My invention consists of a mechanism of transmission between a heavybody and a gearing-shaft having a rotatory and uniform motion.

In order to make my idea clear, I have represented in the accompanyingdrawings the mechanism forming the object of my invention.

In the drawings, Figure l is a vertical section of my mechanism. Figs. 2to 6 show front views of the slot and roller of the crankpin in theirprincipal positions. Fig. 7 shows a modification of the slot shown inFigs. Qto 6. Fig. 8 is a vertical section of a modification of mymechanism. Fig. 9 shows an arrangement having for object theaccumulation of greater power in the guide without augmenting unduly itsstroke or its Weight. Fig. lO is also a modification of Fig. 8, in whichthe screw is governed by the crank by means of a piece whose slot iscurved. Fig. 1l shows a front view of the said curved slot. Fig. 12 isan elevation of a hammer having an alternating circular motion.

In all the iguresthe same letters of reference indicate the same parts.

As may be seen by reference to Figs. 1 to 8, the principle of mymechanism consists of a heavy guide or sliding block a, moving in aframe b of a light block c, sliding with friction on the block a (orconnected with the latter by the arrangement shown in Fig. 8, as will bedescribed farther on) of a shaft d, running in the frame and bearing acrank on which turns the roller e, engaged in a peculiarly-shaped slotf, formed in the block c.

Serial No. 126,436. (No model.)

The object of this mechanism is to impart to the block an alternatingreciprocating movement during three-fourths of the turn of the crankcomprising the ascension of the blocks a and from the lower position tothe highest part of the stroke and the descent to halfthe stroke andthen during the last quarter of the turn the descent of the blocks witha uniform speed equal to the circumferential speed of the crank-pinduring the last half-stroke and then a sudden stoppage and immobility ofthe blocks during the time the crank-pin takes to accomplish its lastquarter of a turn.

By reference to Figs. 2 to 6, which show the face of the slot and theroller of the crankpin in the principal positions, it will `be seen thatthe slot is straight from 1/ to on its upper and lower part and from yto a on the lower part only. Fron u to e the slot has on its upper partthe form of a cycloid and from .e to g/ it has the form of a circle. By

this means from c, Fig. 2, to e3, Fig. 5, a normal movement is obtainedpassing through the positions c', Fig. 3, ee, Fig. 4. From e3, Fig. 5,to 6*, Fig. 6, the block descends at a uniform speed. It is at thismoment that the impact takes place. From e4, Fig. 6, to e, Fig. 2, theblock is stopped, `because the roller enters on a circular part .e y,which is concentric with the shaft. At the position e the regularmovement recommences.

In order to avoid the effect of impact, the block c is made very lightand is attached to the principal tool af, first, by a frictionarrangement, as shown in Fig. l, the cover g being tightened by springs;second, by a slot la, introduced by the spring c' into a notch made inthe block a, as shown in Fig. 8. This bolt gives way as soon as thesliding movement between a and c becomes sufriciently pronounced.

Abutments j, placed above and below, limit the stroke of a and c andprevent the bolt from coming completely out of its notch. By means ofone or other of those contrivances a certain amount of mobility existsbetween a and c, so that a only strikes the blow and does not transmitto the other pieces the very considerable effects produced by theimpact. To this end the friction produced between a and c is regu- IOOlated in such a manner that a slip takes place as soon as the leadingmovement exercised by a on c becomes greater than the normalaccelerating effects produced by the reciprocating motion of the block.In this case the bolt /b is thrown out of gear. The rst arrangement ispreferable for hammers and tools used for various purposes. The slippingaction produces a kind of automatic regulation between L and c. Thesecond arrangement is better adapted to repeating and automaticmachines. The two pieces a and c always reassume their respectivepositions after the blow. One of the great advantages of thisarrangement is that very little strain is produced on the differentparts of the mechanism compared .with the force produced by the impact.

Fig. 7 is a modification of the slot shown in Figs. 2 to 6. In this casethe groove in place of being straight is curved. Its general motionduring the three-fourths of a turn would be that of a crank ofdetermined length and equal to the radius thereof, while the arrangementshown in Fig. 2 is that of a connnectinglink of unlimited length. Thismodified form may be applied in certain cases. The modified part can bearranged either above or underneath, so giving two differentcombinations.

In order to accumulate more force in the block without unduly increasingeither its stroke or its weight, it will be well to adopt thearrangement shown in Fig. 9, where the block ce in its vertical movementcauses the fly-wheel c to turn, the which iiy-wheel is mounted on thescrew l, which enters the nut m in the block. At the moment of theimpact this screw bears on the abutment n and presses with great forceon the block.

In the modification shown in Fig. 10 the screw is operated by the crankthrough the piece 0. This piece is mounted with a springbolt on thesmooth part p of the screw. The roller eenters acurved slot f and thuscommunicates to the piece o an alternate circular movement. This slot(shown in detail in Fig. 11) is on the same principle as thatrepresented in Fig. l.

Fig. l2 shows a hammer having an alternating circular movement. Thehammer r receives its motion from the piece s, in which is seen thecharacteristic slot. This mechanism is what is known as angular-slotmechanlsm.

It is of course understood that the forms, dimensions, details, andmaterials employed in the construction of my mechanism may vary withoutchanging in any way the principle of my invention.

I claim- K l. In a machine of the character described, a reciprocatingtool, a block having frictional sliding connection with the tool, thesaid block being provided with a slot, and a crank having its pinengaged in said slot.

2.. In a kinetic-energy machine, a reciprocating striking-weight havingfriction connection, a link forming a portion of-said frictionconnection, the said link being of such form that the pin of a crankrotating at a suitable and continuous rapidity transmits, duringthree-fourths of a revolution to said link and to the weight that itdrags, the regular link movement, and immediately allows them to freelymake the other half-rectilinear movement during the last quarter of theturn of the crank.

The foregoing specification of my Desmodromical system of mechanismacting on the principle of @is /vz'ea applicable to punches, scales,cutters, hammers, and other similar machine-tools signed by me this 22dday of September, 1902.

EllIIIiE LOUIS NICOLAS DENIS.

Witnesses:

EDWARD P. MACLEAN, MAURICE H. PIGNET.

